Machinery» Flywheels, Pulleys etc.» Pump Flywheel» Pump flywheel Modeling in O scale and in the middle of making a small oil engine I needed a flywheel. The problem was that it needed to be 3/4" dia (that's 3ft in O scale) .. and for the life of me .. I couldn't find anything. I ended...
- A treatise on belts and pulleys, By John Howard Cromwell, pub 1885